The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with operating temperatures ranging from -65°C to 200°C. Available in various mounting styles including front wall, rear wall, jam nut, and box mount receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 II, come in aluminum shells with options for plating such as electroless nickel and cadmium finishes. With 52 insert arrangements, utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. Suitable for demanding applications, these circular connectors provide a durable and secure solution for electrical connections.